DWZ系列外转子轴流通风机是我公司开发的具有自主知识产权的新型轴流通风机。其特点是电机为外转子电机，叶片、网罩直接固定在电机上，结构紧凑、安装方便;扇叶设计及安装符合空气动力学原理,效率高，噪声低,可广泛应用于制冷、换热和通风等领域,分述如下：

　　一 . 风机型号说明

　　二 . 产品结构及说明

　　如图1所示的轴流通风机，由外转子电机、叶片、网罩和导流罩等几部分组成。

1.外转子电机防护等级IP44,绝缘等级F级，转子为压铸铝合金，结构紧凑、安装方便、外形美观。 　　2.叶轮叶片4.0-6.3#为优质铝合金板制作， 7.1-8.0#为压铸铝合金，设计符合空气动力学原理，直接固定在转子上，平衡精度等级为G5.6。 　　3.导流罩采用冷轧钢板制作(用户可自备)，导流罩可以提高风机效率。 　　4.网罩用钢丝焊接而成，直接固定在电机上，对风机起保护作用。 　　5.电机、叶片、网罩和导流罩等零部件表面均 进行喷漆、喷塑等处理，增加了防锈、防腐保护。

　　三、 产品安装说明

　　1.该系列风机的安装有自由吸风和自由排风两种形式， 要求如图2、图3所示：

　　四、 技术参数说明

　　1 . 该样本所列的数据是在标准状况下测得，即大气压力=101.325kPa， 气体密度=1.2kg/m3 ,气体温度=20℃。

　　2 . 风机噪声按国家标准在进风口轴线上，距进风口一米处测定。

　　3 . 电机的功率、电流、转速均为额定值。

　　4 . 该系列风机的工作环境温度为-30℃～+60℃。

　　五、 定货须知

　　定货时请注明下列内容：

　　-完整的风机型号

　　-安装位置

　　-进风方向

　　-是否配备防护网或导流罩

　　-环境温度

　　-空气的相对湿度

　　-安装地点(潮 湿的空气或户外)

　　-空气中存在何种刺激化学物质

　　六、 根据用户要求， 可以提供以下特殊事项：

　　-特殊电压和频率

　　-非标准的接线盒

　　-分离式防护罩

　　-加长的电缆线

　　-低温轴承

　　-特殊的涂覆(清漆或油漆)

Shandong Freshair Co., Ltd. is located in Qilu Chemical Industrial Park. It has total assets of RMB 120 million, covering over 40,000 square meters and 270 employees. It is a medium-sized joint-stock enterprise approved by the Shandong provincial government, and has become a main production enterprise in China for air-conditioning fan, rail train fan and wind turbine.

Shandong Freshair Co., Ltd. is formerly a motor repair plant in Linzi District of Zibo City founded in 1956, which was transformed into a share-holding company renamed as "Zibo Air-conditioning Fan Co., Ltd." in 1993. The company adheres to the tenet of "people-oriented, science and technology-based", insists on the business philosophy of "integrity, cooperation, win-win, and development", carries forward the entrepreneurial spirit of "innovative, pragmatic, pioneering, enterprising, and progressive". Through hard work, the company successfully merged an electric fan factory in Zibo and Zibo Radio Twelve Plant respectively in August 1995 and May 1997, formed a diversified production and operation model and enhanced the market competitiveness. In 1998, the company responded to the government call to complete the property rights reform, restructuring into a private enterprise. In 2001, the company was renamed as "Shandong Freshair Co., Ltd." upon the approval of Shandong Provincial Trade and Industry Bureau. In 2008, the company invested more than RMB 50 million to move into Qilu Chemical Industrial Park in Linzi District, with the plant construction achieved a pattern of new industrial plant with modern high standard and garden-style.

Since its inception, Shandong Freshair has been committing to the research and development work for Freshair brand of fan products, and paying attention to product brand image. The company now has thirteen series of more than 2,000 varieties of air-conditioning fan products. The company adheres to the business path of "quality for survival, efficiency for development", having accessed to more than 30 national patents, and taken the lead in passing the ISO9001 quality system certification, CCC product safety certification, the European Union CE certification, the international welding standards system ISO3834 certification, the European railway products EN15085 certification and the international railway industry quality management system IRIS certification. In addition, the company has 11 series of products obtained the national industrial production permits. The company is well recognized by the domestic and international air-conditioning fan industry, and praised by the vast of customers.

Shandong Freshair Co., Ltd. has a first-class R&D team and a large number of skilled technical workers. The company signed long-term technical cooperation and personnel training agreements with more than 10 scientific research units and universities and colleges including Xi'an Jiaotong University, Shenyang Blower Research Institute and Shandong University of Technology. The most advanced multi-nozzle fan performance laboratory established in 2001 passed the accreditation of CNAS (China National Accreditation Service for Conformity Assessment). It is the first accredited enterprise laboratory in China, which marks the fan test data of Freshair has authority and international mutual recognition.

Shandong Freshair Co., Ltd. attaches great importance to the investment of production equipment. The company mainly possesses Nissan CNC punch purchased by nearly RMB 10 million, laser cutting machine and other advanced air-conditioning fan CNC equipment. The company has now more than 300 units of equipment. Advanced precision CNC equipment ensures the leading position of Freshair brand air conditioning fan.

Shandong Freshair Co., Ltd focuses on safe and civilized production, pays attention to the improvement of the company's safety management system, steadily promotes the safety management, and tries to create a security-oriented enterprise. The company passed the national security standardization Level three certification in 2010.

Shandong Freshair Co., Ltd. has a sound marketing system, setting up 12 offices and after-sales service points in China and having formed a huge and efficient market sales service network. The Freshair brand series fans are widely used in the Great Hall of the People, Diaoyutai State Guesthouse, China Central Television studio, Radio and Television Transmitting Tower, Shanghai Oriental Pearl, Nanjing, Shenzhen, Guangzhou and Beijing Metros, Beijing New Airport, Hong Kong Airport and Xiaotangshan Hospital and other places. BDW series of explosion-proof fan is equipped on ships, submarines and military equipment for several times; DF and LKZ series of fans are used for the national high-speed rail project; some products are exported to the United States, Canada, Japan, Russia, Brazil, Malaysia and other countries.

In the development course of more than 50 years, Shandong Freshair has won dozens of provincial and national awards: Freshair brand products are recommended as recommend products by the China Refrigeration Industry Association and Consumer Associations; Credit Enterprise under Key Protection of 3.15, China Quality Service Reputation AAA-level Enterprise, "Quality Assured Brand of China" named by the State Administration of Quality Supervision in 2002, "National Honor Unit"; approved as "High-tech Enterprise" by Shandong Science and Technology Department in 2003, named as "Shandong Famous Brand" by Shandong Trade and Industry Bureau in 2005; named as "Brand-name Products in Shandong Province" by Shandong Quality and Technical Supervision Bureau in 2006; awarded the title of "China's Top Enterprise in Management Competitiveness of 2006 " by China Management Science Research Institute; named "Shandong Province Star Enterprise of China Patent" by Shandong Science and Technology Department and Shandong Intellectual Property Office in 2010; and awarded the honorary title of "Management Progress Demonstration Enterprise in National Machinery Industry" by China Machinery Industry Association and China Machinery Industry Enterprise Management Association in 2011.